GB1440256A - Oxygen-air diluter - Google Patents

Oxygen-air diluter

Info

Publication number
GB1440256A
GB1440256A GB4374973A GB4374973A GB1440256A GB 1440256 A GB1440256 A GB 1440256A GB 4374973 A GB4374973 A GB 4374973A GB 4374973 A GB4374973 A GB 4374973A GB 1440256 A GB1440256 A GB 1440256A
Authority
GB
United Kingdom
Prior art keywords
oxygen
valve
pressure
outlet
diaphragm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4374973A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robertshaw Controls Co
Original Assignee
Robertshaw Controls Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robertshaw Controls Co filed Critical Robertshaw Controls Co
Publication of GB1440256A publication Critical patent/GB1440256A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/12—Preparation of respiratory gases or vapours by mixing different gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S137/00—Fluid handling
    • Y10S137/908—Respirator control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/1842—Ambient condition change responsive
    • Y10T137/1939—Atmospheric
    • Y10T137/2012—Pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled
    • Y10T137/7762—Fluid pressure type
    • Y10T137/7764—Choked or throttled pressure type
    • Y10T137/7766—Choked passage through main valve head
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7782—With manual or external control for line valve

Landscapes

  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

1440256 Respiratory apparatus ROBERTSHAW CONTROLS CO 18 Sept 1973 [19 Sept 1972] 43749/73 Heading A5T An oxygen-air diluter for respiratory apparatus comprises a casing 10, ambient air inlet 14 connected by conduit 58 to outlet 16, and a chamber 34 separated into an outlet pressure sensing portion and a reference pressure sensing portion by diaphragm 38 which causes valve 26 to regulate the flow of oxygen from inlet 12 to outlet 16, the pressure in the reference pressure sensing portion being controlled by valves 72 and 86 causing such portion to be vented to atmosphere or-connected to the oxygen inlet. At a low altitude and with a manually-operable lever 88 at its dilute mode position, suction by the user at outlet 16 causes diaphragm 38 to push paddle 36 thereby opening orifice 32. Oxygen passes from the top side of the diaphragm 28 faster than it can be replenished through passage 30 and so diaphragm 28 lifts valve member 26 allowing a small amount of oxygen to pass from inlet 12 to outlet 16 to supplement air drawn through air inlet 14. When suction ceases equal oxygen pressure reestablishes itself on each side of diaphragm 28 via passage 30 and since the top side is of greater area than the bottom side, diaphragm 28 moves downwards whereby valve member 26 cuts off the oxygen flow. As the altitude increases, aneroid bellows 64 expand to progressively close valve 68 reducing the air supply and pushes rod 92 to open valve 72. Oxygen then passes faster from orifice 78 than it can be replenished through restriction 108 so that spring 100 closes valve member 86 against seat 102 and the oxygen inlet pressure presses diaphragm 38 downwards, this pressure being limited by valve 42. With increasing altitude the bellows 64 become fully expanded and 100% oxygen is supplied to the user on demand. As the altitude further increases, aneroid bellows 50 expand and contact valve 42 to restrict its opening, this causes 100% oxygen to be supplied at pressure to outlet 16. Should the oxygen inlet pressure decrease sufficiently, spring 122 acts on piston 116 to progressively close valve 114. Valve 62 exhausts excess outlet pressure. Turning lever 88 to its 100% oxygen mode position opens valve 72 causing 100% oxygen to be supplied at pressure to outlet 16.
GB4374973A 1972-09-19 1973-09-18 Oxygen-air diluter Expired GB1440256A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US290426A US3875957A (en) 1972-09-19 1972-09-19 Oxygen-air diluter device

Publications (1)

Publication Number Publication Date
GB1440256A true GB1440256A (en) 1976-06-23

Family

ID=23115936

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4374973A Expired GB1440256A (en) 1972-09-19 1973-09-18 Oxygen-air diluter

Country Status (2)

Country Link
US (1) US3875957A (en)
GB (1) GB1440256A (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240419A (en) * 1977-09-26 1980-12-23 Normalair-Garrett (Holdings) Limited Breathable gas delivery regulators
US4332268A (en) * 1979-01-16 1982-06-01 Nippondenso Co., Ltd. Atmospheric pressure compensation device
US4274404A (en) * 1979-04-13 1981-06-23 American Safety Flight Systems, Inc. Oxygen supply system controlled by user exhalation
US4391290A (en) * 1980-10-23 1983-07-05 General Electric Company Altitude sensing control apparatus for a gas turbine engine
US4450837A (en) * 1982-06-07 1984-05-29 Kelsey W. Hatcher Underwater breathing apparatus
US4499914A (en) * 1983-04-14 1985-02-19 Litton Systems, Inc. Selector valve for an aircraft on board oxygen generation system with high pressure oxygen backup
US4648397A (en) * 1985-10-28 1987-03-10 The United States Of America As Represented By The Secretary Of The Air Force Electronically compensated pressure dilution demand regulator
GB2195900B (en) * 1986-09-06 1991-07-24 Peter Joseph Jackson Pilot operated valves
GB8724081D0 (en) * 1987-10-14 1987-11-18 Normalair Garrett Ltd Aircraft on-board oxygen generating systems
GB8729501D0 (en) * 1987-12-18 1988-02-03 Normalair Garrett Ltd Aircraft aircrew life support systems
US5372129A (en) * 1992-06-23 1994-12-13 Ryder; Steven L. Oxygen dilution device for maintaining an essentially constant proportion of primary gas in a diluent gas
FR2752383B1 (en) * 1996-08-16 1998-11-06 Intertechnique Sa RESPIRATORY PROTECTION EQUIPMENT WITH INDICATION OF OPERATION
US5743292A (en) * 1996-10-07 1998-04-28 Mcdonnell Douglas Corporation Pressure actuated check valve
US6380859B1 (en) 1998-08-18 2002-04-30 David W. Brownlee Hyperbaric oxygen enrichment system for vehicles
US6034606A (en) * 1998-08-18 2000-03-07 Brownlee; David W. Oxygen enrichment system for wheeled vehicles cross-reference to related applications
US6191694B1 (en) 1998-08-18 2001-02-20 David W. Brownlee Oxygen enrichment system for vehicles
US6866701B2 (en) * 2002-11-26 2005-03-15 Udi Meirav Oxygen enrichment of indoor human environments
US6726558B1 (en) 2002-11-26 2004-04-27 Udi Meirav Oxygen enrichment of indoor human environments
US7210479B2 (en) * 2003-11-07 2007-05-01 Van Den Akker Erik Hyperoxic breathing system
JP4864976B2 (en) * 2005-10-11 2012-02-01 ビーイー・インテレクチュアル・プロパティー・インコーポレイテッド Improvement of respirator and adjuster for airplane
EP3421099B1 (en) * 2006-04-20 2019-12-11 Zodiac Aerotechnics Breathing apparatus for an aircrew member
GB0614574D0 (en) * 2006-07-22 2006-08-30 Reynolds Daniel Pressure activated device and breathing system
US8091582B2 (en) 2007-04-13 2012-01-10 Cla-Val Co. System and method for hydraulically managing fluid pressure downstream from a main valve between set points
WO2008127899A2 (en) * 2007-04-13 2008-10-23 Cla-Val Co. System and method for hydraulically managing fluid pressure downstream from a main valve
BR112013006163C8 (en) * 2010-09-23 2019-10-22 Intertechnique Sa oxygen regulator to deliver breathing gas to an aircraft

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1106766A (en) * 1965-05-13 1968-03-20 British Oxygen Co Ltd Fluid flow regulators
US3509895A (en) * 1967-07-20 1970-05-05 Bendix Corp Oxygen regulator

Also Published As

Publication number Publication date
US3875957A (en) 1975-04-08

Similar Documents

Publication Publication Date Title
GB1440256A (en) Oxygen-air diluter
GB1244892A (en) Compressor bleed air flow control
GB1019986A (en) Breathing demand regulator
US3526241A (en) Oxygen-air diluter for breathing apparatus
JPH01199100A (en) Regulator
GB1407624A (en) Altitude compensating pressure regulator
US3509895A (en) Oxygen regulator
GB1439301A (en) Control device
US4674429A (en) Underwater buoyancy apparatus
US3495619A (en) Reducing valve
US2608200A (en) Oxygen demand regulator, including altitude compensator
GB1124606A (en) Oxygen diluter system
GB1323143A (en) Regulating systems
GB1466382A (en) Inhalation devices
ATE77458T1 (en) PRESSURE REGULATING VALVE AND SYSTEM WITH SUCH VALVE.
GB1227465A (en)
JPH078393Y2 (en) Pressure regulator
US3974851A (en) Demand type governors
US2437462A (en) Demand valve
GB1422399A (en) Oxygen regulator
US2988085A (en) Breathing apparatus
GB1480803A (en) Pressure regulator for pneumatic systems
GB1453796A (en) Control valve for a diaphragm operated gas valve
US3060933A (en) Arrangement for controlling the supply of gas to a breathing device
US3138154A (en) Breathing device

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee